Vio® Dyes technical specifications Bright dyes for multicolor flow cytometry Fluorochrome-conjugated MACS® Antibodies are perfectly suited for identification and enumeration of human, mouse, rat, or non-human primate cells. Visit www.macsantibodies.com for a complete product list of MACS Antibodies, Detection Kits, Cytokine Secretion Assays, and Control Cocktails. Vio® Dyes represent a family of fluorochromes for flow cytometry and fluorescence microscopy developed by Miltenyi Biotec. VioBlue®, VioGreen™, VioBright™ FITC, PE-Vio® 615, PE-Vio® 770, PerCP-Vio® 700, Vio® 515, VioBright™ 515, APC-Vio® 770 are characterized by high fluorescence intensities and low spillover, making them an ideal choice for multicolor applications. Combined with traditional fluorochromes, such as FITC, PE, PerCP, and APC, the new Vio Dyes expand Miltenyi Biotec’s antibody offering and allow researchers a greater selection of antibodies for multiparameter cell analysis. VioBlue VioGreen VioBright 515 / Vio 515 VioBright FITC PerCP-Vio 700 PE-Vio 770 PE-Vio 615 APC-Vio 770 450 Violet laser (405nm) 500 Blue laser (488nm) 550 Yellow laser (561 nm) 600 650 Red laser (635 nm) 700 750 800 Wavelength (nm) Figure 1: Emission spectra of Vio Dyes. Emission spectra of Vio Dyes: VioBlue, VioBright 515, Vio 515, VioGreen, VioBright FITC, PE-Vio 615, PerCP-Vio 700, PE-Vio 770 and APC-Vio 770. Vio® Dyes technical specifications | April 20171/18 Overview of flurochromes available from Miltenyi Biotec Excitation laser (nm) Exmax (nm) VioBlue 405 400 452 V1 450/50 V1 450/50 VioGreen 405 388 520 V2 525/50 V2 525/50 Fluorochrome Emmax (nm) MACSQuant Analyzer Channel Filter (nm) MACSQuant VYB Channel Filter (nm) VioBright 515 488 488 514 B1 525/50 B1 525/50 Vio 515 488 488 514 B1 525/50 B1 525/50 VioBright FITC 488 496 522 B1 525/50 B1 525/50 FITC 488 495 520 B1 525/50 B1 525/50 PE 488 or 561 565 578 B2 585/40 Y1 586/15 PE-Vio 615 488 or 561 565 619 B3 655–730 Y2 615/20 PerCP 488 482 675 B3 655–730 N/A N/A PerCP-Vio 700 488 482 704 B3 655–730 N/A N/A PE-Vio 770 488 or 561 565 775 B4 750 LP Y4 750 LP APC 561 or 635 652 660 R1 655–730 Y3 661/20 APC-Vio 770 561 or 635 652 775 R2 750 LP Y4 750 LP Table 1: Fluorochrome specifications. Miltenyi Biotec dyes Other dyes VioBlue® Alexa Fluor® 405, BD™ Horizon™, V450, BV 421™, Calcein Violet 450 AM, Cascade Blue®, DAPI, Vybrant®, DyeCycle™ Violet, eBFP, eFluor® 450, Hoechst Dyes, Pacific Blue™, Zombie Violet™ VioGreen™ Alexa Fluor® 430, AmCyan, BD™ Horizon™ V500, BV510™, Cascade Yellow™, Krome Orange™, Pacific Orange™, Qdot® 525 Zombie Aqua™ FITC, VioBright™ FITC, Vio® 515, VioBright™ 515 Alexa Fluor® 488, Calcein AM, DyLight® 488, CFSE, GFP, SYTOX® Green, Vybrant® DyeCycle™ Green, YFP, Zombie Green™, BD Horizon™ Brilliant Blue 515 PE Cy™3, Vybrant® DyeCycle™ Orange PerCP, PerCP-Vio® 700 PE-Cy™5, PE-Cy™5.5, Per-Cy™5.5, Per-CP-eFluor® 710, Propidium iodide, 7-AAD PE-Vio® 615 ECD, PE-Texas Red®, PE-CF594, PE/Dazzle™ 594, PE-eFluor® 610 PE-Vio® 770 PE-Alexa Fluor® 750, PE-Cy™ 7 APC Alexa Fluor® 647, Alexa Fluor® 700, APC-Alexa Fluor® 700, Cy™5, DRAQ5®, eFluor® 660 APC-Vio® 770 APC-Alexa Fluor® 750, APC-Cy™7, APC-eFluor™ 780, APC-H7, Zombie NIR™ Table 2: Available Vio Dye fluorochromes. Support Material •Fluorescence spectra overview poster •Fluorochromes and instruments poster •Fluorochrome brightness index •Lot-to-lot consistency data •Staining enhancement products • Viability dyes Vio® Dyes technical specifications | April 20172/18 VioBlue® and VioGreen™ Fluorochromes are a novel range of violet laser excited dyes developed exclusively by Miltenyi Biotec. Designed to maximize the potential of a flow cytometer’s violet laser, they not only show superior optical performance compared with many other 405 nm excited fluorochromes, but also significant advances in brightness, signal-to-noise ratios, and intralaser compensation requirements. In addition, neither fluorochrome exhibits significant levels of photoinduced degradation, and can consequently be used for many different applications, such as fluorescent microscopy. A Intensity Violet laser dyes 330 VioBlue® Dye Fluorochrome Absorption max. (nm) Emission max (nm) VioBlue 400 455 Pacific Blue 401 452 Cascade Blue 401 419 Alexa Fluor 405 401 421 eFluor 450 405 450 BD Horizon V450 404 448 BD Horizon Brilliant™ Violet 421 407 421 Table 3: Absorption and emission maximums of fluorochromes related to VioBlue. Laser and filter compatibility With a maximum absorption and emission at 400 nm and 455 nm respectively, VioBlue Fluorochromes are fully compatible with standard filter sets from all major flow cytometry hardware providers, giving researchers the flexibility to use the VioBlue Dye with existing laboratory platforms (figure 2). Pacific Blue Cascade Blue Alexa Fluor 405 VioBlue B Intensity •Coumarin-based dye with excitation and emission wavelengths of 405 nm and 455 nm, respectively •Superior alternative to Pacific Blue, Alexa Fluor 405, or BD Horizon V450 •Multiplexing of VioBlue with other fluorochromes is easily possible, adding to the variety of marker combinations for multiparameter cell analysis • Combined use with the VioGreen Dye 430 380 Wavelength (nm) 380 430 480 530 Wavelength (nm) Pacific Blue Cascade Blue Alexa Fluor 405 VioBlue Figure 2: Absorption (A) and emission (B) spectra of VioBlue compared to Pacific Blue, Cascade Blue, and Alexa Fluor 405. The blue box represents the 450/50 nm filter. Enhanced brightness Human peripheral blood mononuclear cells (PBMC) and mouse splenocyte (MS) cells stained with VioBlue® exhibit excellent discrimination between positively and negatively stained populations over a wide range of antibody specificities (figure 3). Furthermore, VioBlue provides a superior alternative to many spectrally similar conjugates for the V1 channel, further increasing the options of multicolor analysis (figure 4). Vio® Dyes technical specifications | April 20173/18 750 750 Side scatter B 1000 Side scatter A 1000 500 250 0 -1 0 1 10¹ 10² High stability during fixation It is of crucial importance for a conjugate to retain its fluorescent properties after fixation, in order to allow researchers to maximize the use of biological samples. The VioBlue Dye has a very high stability after fixation with paraformaldehyde (figure 5), equal to or exceeding many other spectrally similar fluorochromes. 500 250 0 -1 0 1 10³ CD20-VioBlue 10¹ 10² 10³ CD123-VioBlue A C 1000 D 1000 750 750 B 10³ 10³ 10¹ 10² CD8-VioBlue 10³ 250 0 -1 0 1 10¹ 10² 10³ VioBlue VioBlue PacificPacific Blue Blue Relative cell number Relative cell number CD303-PE -1 0 1 10¹ 10² 10³ 1 0 -1 CD123-VioBlue -1 0 1 10¹ 10² 10³ CD123-VioBlue CD90.2-VioBlue Figure 3: Human peripheral blood mononuclear cells (PBMC) or mouse splenocyte (MS) cells were stained with CD20-VioBlue (A; PBMCs), the rare cell marker CD123‑VioBlue (B; PBMCs), CD8-VioBlue (C; PBMCs), or CD90.2-VioBlue (D; MS) and analyzed by flow cytometry using the MACSQuant Analyzer. -1 0-1 10 1 10¹ 10¹10² 10² 10³ 10³ VioBlue 1 0 -1 10¹ Figure 5: CD123-VioBlue staining before (A) and after (B) fixation with 3.7% paraformaldehyde, indicating a minimal decrease in fluorescence after fixation. Lot-to-lot variation Reproducible lot-to-lot antibody performance ensures the integrity of long-term studies, and is crucial in comparing experimental results over a period of time. All MACS® Antibodies are vigorously tested to ensure consistent quality, thus eliminating the need for repeat testing arising from reagent degradation or failure (figure 6). A Pacific Blue Figure 4: Fluorescence intensity of cells labeled with CD14 antibodies conjugated to either VioBlue or Pacific Blue. -1 -10 01 1 10¹10¹ 10²10² 10³10³ -1 -10 01 1 10¹10¹ 10²10² 10³10³ CD3-VioBlue CD3-VioBlue CD4-VioBlue CD4-VioBlue C D Relative cell number Relative cell number Decreased spillover VioBlue® Dyes exhibit minimal spillover into the V2 channel, making them perfect candidates for multicolor panels, which utilize both violet channels. Furthermore, VioBlue is negligibly excited by the 488 nm laser, and thus requires no compensation between the V1 and B1 channels. B Relative cell number Relative cell number 0 -1 0 1 10¹ Relative cell number Relative cell number 250 500 10² Relative cell number Relative cell number 500 CD303-PE Side scatter Side scatter 10² -1 -10 01 1 10¹10¹ 10²10² 10³10³ -1 -10 01 1 10¹10¹ 10²10² 10³10³ CD20-VioBlue CD20-VioBlue CD45-VioBlue CD45-VioBlue Figure 6: Lot-to-lot variation for different lots of CD3 (A), CD4 (B), CD20 (C), and CD45 (D) antibodies conjugated to VioBlue. Black and blue lines represent different antibody lots. Vio® Dyes technical specifications | April 20174/18 Emission max. (nm) VioGreen 388 520 Pacific Orange 400 551 Krome Orange 398 528 AmCyan 457 491 Horizon V500 415 500 BD Horizon Brilliant™ 510 405 510 Table 4: Absorption and emission maximums of fluorochromes comparable to comparable to VioGreen™. Laser and filter compatibility With a standard 525/50 filter set, the VioGreen™ Dye exhibits a better spectral profile than Pacific Orange or AmCyan (figure 7). A 1000 B 1000 750 750 Side scatter Absorption max. (nm) 500 250 0 -1 0 1 10¹ 10² 500 250 0 -1 0 1 10³ CD14-VioGreen C 1000 D 1000 750 750 500 250 0 -1 0 1 10¹ 10² 10¹ 10² 10³ CD20-VioGreen Side scatter Fluorochrome Side scatter •Large Stokes shift fluorochrome, emitting strong fluorescence at 520 nm upon excitation at 405 nm •Significantly increased mean fluorescence intensities and higher stain indices over Pacific Orange, Krome Orange, and BD Horizon V500 • Non-protein fluorochrome • Suitable for ethanol fixation • Combined use with the VioBlue® Dye •Perfectly suited for multiparameter cell analysis using all current flow cytometers Enhanced brightness Like most dyes designed for the violet laser, VioGreen shows a lower fluorescence intensity compared to other well-established fluorochomes, such as PE. However, specific human and mouse cellular populations are easily distinguishable between positively and negatively labeled cells (figure 8). In addition, many VioGreen Dyes exhibit brighter fluorescence compared to spectrally similar conjugates, such as Pacific Orange (figure 9 and table 5), AmCyan, and Horizon V500, when measured by mean fluorescence intensity (MFI) or stain index (normalized signal-to-noise ratio). Side scatter VioGreen™ Dye 500 250 0 -1 0 1 10³ CD15-VioGreen 10¹ 10² 10³ CD8a-VioGreen A 300 350 400 450 VioBlue Pacific Blue Relative cell number Intensity Figure 8: Human peripheral blood mononuclear cells (PBMC) or mouse splenocyte (MS) cells were stained with CD14-VioGreen (A; PBMCs), CD20-VioGreen (B; PBMCs), CD15-VioGreen (C; PBMCs), or CD8a-VioGreen (D; MS) and analyzed by flow cytometry using the MACSQuant® Analyzer. 500 Wavelength (nm) B -1 0 1 Intensity VioGreen 10¹ Horizon V500 10² 10³ Krome Orange Figure 9: Analysis of human PBMCs using CD3 antibodies conjugated to either VioGreen, Horizon V500, or Krome Orange. 419 519 619 694 Wavelength (nm) VioGreen AmCyan Pacific Orange Figure 7: Absorption and emission spectra of VioGreen. Vio® Dyes technical specifications | April 20175/18 Conjugate Clone MFI Stain index Percent spillover V1 B1 CD3-VioGreen BW264/56 13 13 5.5 0.5 CD3-Horizon V500 UCHT1 11 9 8.0 1.5 CD3-Krome Orange UCHT1 6 7 3.0 1.0 CD8-VioGreen BW135/80 16 17 6.0 0.2 CD8-Pacific Orange BW135/80 10 11 3.0 0.5 Table 5: MFI, stain indices, and % spillover of CD3-VioGreen, CD3‑Horizon V500, CD3-Krome Orange, CD8-VioGreen, and CD8-Pacific Orange. High stability during paraformaldehyde and ethanol fixation VioGreen™ Dyes exhibit strong photostability during fixation, with only very minimal photodegradation, thus highlighting VioGreen’s suitability as a fluorochrome for use in studies that require fixation (figure 10). It is also suitable for ethanol fixation. 750 750 Side scatter B 1000 Side scatter A 1000 500 250 0 -1 0 1 10¹ 10² CD14-VioGreen 10³ 500 Blue laser dyes VioBright™ FITC, VioBright 515 and Vio® 515 Dyes VioBright™ FITC, VioBright 515 and Vio® 515 are revolutionary blue laser (488 nm) excitable dyes, developed exclusively by Miltenyi Biotec. The innovative VioBright technology allows for an increased number of fluorochrome molecules per antibody, as compared to conventional conjugation. This results in dyes that emit a signal detected in the standard FITC channel, but with brightness levels similar to PE. These blue laser dyes expand the dimensions of multicolor flow analysis and provide a bright alternative for confident detection of rare cells, dim, and uncharacterized markers. Dye Features Application VioBright FITC (1st generation VioBright dye) • High brightness Detection of extracellular markers VioBright 515 (2nd generation VioBright dye) • Very high brightness • Low spill over • High fixation- & photostability Detection of extracellular markers Vio 515 (Organic dye) • Moderate brightness, • Low spill over • High fixation- & photostability Detection of intracellular markers 250 0 -1 0 1 10¹ 10² 10³ Table 6: Features and application specifications for VioBright FITC, VioBright 515 and Vio 515 in comparison. CD14-VioGreen Figure 10: CD14-VioGreen staining before (A) and after (B) paraformaldehyde fixation, indicating a minimal decrease in fluorescence after fixation. Laser and filter compatibility Excitable by the blue laser (488 nm), VioBright 515 and Vio 515 display peak excitation and emission at 488 nm and 514 nm, respectively (figure 11 and table 7). VioBright FITC is excited at 496 nm with a peak emission at 522 nm. The high intensity fluorescent signals can be detected with a standard FITC filter such as 525/50 on MACSQuant Instruments. Thus, no change in the filter or cytometer is required. Along with PE, the VioBright FITC, VioBright 515 and Vio 515 dyes enhance the potential of the blue laser, one of the most common laser lines available for single laser to multi-laser instruments. Fluorochrome Absorption max. (nm) Emission max. (nm) VioBright 515 488 Vio 515 488 514 VioBright FITC 496 522 FITC 495 520 Alexa Fluor 488 495 519 BD Horizon Brilliant Blue 515 490 515 514 Table 7: Absorption and emission maximums of fluorochromes comparable to VioBright FITC, VioBright 515 and Vio 515. Vio® Dyes technical specifications | April 20176/18 A A Absorption spectra B 10³ 1.000 10³ Absorption 0.600 10² CD4-APC CD4-APC 10² 0.800 10¹ 1 0 -1 -1 0 1 0.400 10¹ 10² 10¹ 1 0 -1 -1 0 1 10³ CD25-PE 10¹ 10² 10³ CD25-VioBright FITC 0.200 0.000 440 450 460 470 480 490 500 510 520 530 Wavelength (nm) Figure 13: Human PBMCs were stained with CD25 antibodies conjugated to PE or VioBright FITC, as well as with CD4-APC, and analyzed by flow cytometry using the MACSQuant Analyzer. Cell debris and dead cells were excluded from the analysis based on scatter signals and propidium iodide fluorescence. Emission spectra B 1 B A CD3-VioBlue Emission 0.8 0.6 0.4 0.2 0 500 510 520 530 540 550 560 570 Wavelength (nm) VioBright FITC VioBright 515 Figure 14: Human whole blood was stained with CD3-VioBlue® and CD56-VioBright™ 515 or CD56-BB515, respectively. Vio 515 FITC Figure 11: Absorption (A) and emission (B) spectra of VioBright™ FITC, VioBright 515 and Vio 515 compared to FITC. Reliable analysis of rare cells requires specific identification of low frequency cellular subset and clear target population resolution. Thus, highly specific antibodies together with bright conjugates are a prerequisite for detection of such low frequency populations. As demonstrated in figures 11–14, VioBright FITC and VioBright 515 represent bright dye alternatives for optimal detection of your subpopulation of interest and detailed phenotypic analysis. A CD56-FITC B 10³ CD34-VioBlue Enhanced brightness VioBright™ FITC, VioBright 515 and Vio® 515 are superior dyes for detection of low-expressed markers, as shown in figure 12 and 13. With stain indices (SI) and mean fluorescent intensities similar to PE, staining with these novel dyes allows for an excellent resolution of positive and negative populations. 10² 10¹ 1 0 -1 -1 0 1 10¹ 10² CD133/1-PE 5 CD 6- FI TC CD B -V 56 FI TC C 6 D5 B -V 5 51 C 6 D5 -B CD56-VioBright 515 CD56-BB515 580 15 B5 10³ CD34-VioBlue 490 10³ 10² 10¹ 1 0 -1 -1 0 1 10¹ 10² 10³ CD133/1-VioBright FITC Figure 15: CD34 + enriched human PBMCs were stained with CD133/1 antibodies conjugated to PE or VioBright FITC as well as with CD34VioBlue and analyzed by flow cytometry using the MACSQuant Analyzer. Cell debris and dead cells were excluded from the analysis based on scatter signals and propidium iodide fluorescence. Figure 12: Human PBMCs were stained using CD56 antibodies conjugated to FITC, VioBright FITC, VioBright 515, or BB515 and analyzed by flow cytometry using the MACSQuant® 10 Analyzer. Vio® Dyes technical specifications | April 20177/18 Conjugate Stain index VioBright FITC PE VioBright FITC PE 3.3 2.0 5.0 4.0 CD335 4.8 4.0 8.5 11 CD133/1 3.5 4.7 4.7 4.7 CD25 Table 8: MFI and stain indices of CD25 (clone 4E3), CD335 (clone 9E2), and CD133/1 (clone AC133) antibodies conjugated to either VioBright FITC or PE. Spill over Compared to standard FITC, VioBright 515 and Vio® 515 dyes display reduced spill over into the PE channel (table 8). In contrast, VioBright FITC has a slightly higher spill over into the PE channel. Thus, with nominal change in compensation settings, these innovative dyes offer the benefit of a brighter staining. Fixation stability Bright fluorochrome conjugates, such as PE and APC, are often sensitive to fixatives like Methanol. For a successful flow cytomeric analysis, which often involves staining of intracellular markers, stability of the fluorochrome conjugates is critical. VioBright 515 conjugates show excellent stability to methanol- and paraformaldehyde-based fixatives with only little compromise in brightness (figure 16). 35 30 Stain Index MFI 25 20 15 10 5 0 MACSQuant VYB Compensation in channel Y1 (%) MFI Stain index 66 106 8.5 0 A CD4VioBright FITC A CD4-FITC 29 49 6.5 0 A CD4-PE 58 126 – – B CD4VioBright FITC 52 81 9.3 0 B CD4-FITC 20 35 7.0 0 B CD4-PE 39 73 – – Table 9: Compensation requirements in PE channel (B2) of CD4 (clone VIT4) antibodies conjugated to VioBright FITC, FITC, or PE. Conjugate Clone MFI 10.6 Stain index 18.3 MACS Quant Compensation in Channel B2 [%] CD56-FITC REA196 6.6 CD56-VioBright FITC AF12 15.8 22.6 8.6 CD-VioBright 515 REA196 31.9 56.3 4.2 CD56-BB515 B159 4.9 4.4 6.2 Table 10: Mean fluorescent intensities (MFI) and stain indices of anti-CD56 antibodies conjugated to FITC, VioBright 515, and BB515. PFA Fixation No Fixative CD56(REA196)-VioBright 515 MethanolFixation CD56(REA196)-PE Figure 16: Human PBMCs were stained using CD56 antibodies (clone REA196) conjugated to VioBright 515 and PE. In addition, cells were analyzed before and after fixation using paraformaldehyde and 90% methanol. Stained cells were analyzed by flow cytometry using the MACSQuant® 10 Analyzer. Photo stability The stability of VioBright 515 upon exposure to confocal laser light was analyzed at different time points on a Zeiss LSM710 confocal microscope. Significantly higher mean fluorescence intensity (MFI) compared to FITC conjugate, were demonstrated for these time points (figure 17). VioBright 515 shows comparable stability to Alexa Fluor 488 conjugated antibodies indicating the excellent suitability for immunofluorescence microscopy. % 100 Normalized Intensity Sample Conjugate MACSQuant Analyzer 10 Compensation in channel B2 (%) 80 60 40 20 0 02:00 VioBright 515 07:00 FITC 12:00 Min 17:00 Alexa Fluor 488 Figure 17: Human PBMCs were stained with fluorochrome-conjugated CD4 antibodies. Stained cell samples were fixed with p-formaldehyde for 20 min and transferred to a 96-well plate for analysis. The plotted curve is normalized over multiple time points. Vio® Dyes technical specifications | April 20178/18 Blue laser tandem conjugates A PE-Vio® 615 Tandem Conjugate 1.0 PE-Vio® 615 is a tandem dye with PE as the donor dye and Vio® 615 as the acceptor dye. This tandem dye is optimized for efficient donor-to-acceptor dye energy transfer, high fluorescent intensity, and low spillover into the donor dye detection channel. Designed to be a superior alternative to ECD, PE-Texas Red®, PE-efluor® 610, PE-CF594 and PE/ Dazzle™ 594, this Vio Dye expands the options for flexible multicolor panel design and provides a bright dye for confident detection of dim and rare markers. 0.8 Absorption max (nm) Emission max (nm) PE-Vio 615 565 619 ECD, PE-Texas Red 565 613 PE-efluor 610 565 606 PE-CF594 565 614 PE/Dazzle 594 566 612 Table 11: Absorption and emission maximums of fluorochromes comparable to PE-Vio 615. Laser and filter compatibility The PE molecule shows peak absorption at two wavelengths, 496 nm and 565 nm, respectively. This allows for optimal excitation of PE-containing tandem dyes such as PE-Vio 615 using blue, green, and yellow green laser lines (488-561 nm). This enables the utilization of the maximum potential of your instrument with flexible choice of laser lines (figure 19). As depicted in figure 15, the extent of absorption at 565 nm is greater than 496 nm nm and thus, the maximum excitation of PE-Vio 615 can be achieved with instruments such the MACSQuant VYB, which uses yellow laser lines for excitation of PE and all PE containing tandem dyes. The emission signal can be detected using typical filters design to detect PE-Texas Red, such as 615/20 nm. 0.2 0 400 450 500 550 600 650 700 450 500 550 600 650 700 B 1.0 0.8 0.6 0.4 0.2 0 400 — PE-CF594 — PE-Vio 615 — ECD — PE-Dazzle 594 Figure 18: Absorption (A) and emission (B) spectra of PE-Vio 615 and comparable fluorochromes. A B 10³ 10³ 10² 10² CD3-FITC Fluorochrome 0.4 CD3-FITC •Optimal excitation with blue (488 nm), green (532 nm), and yellow green (561 nm) laser lines for maximum flexibility. •Excellent brightness for confident detection of dim, rare, and uncharacterized markers. •Extensive portfolio of PE-Vio 615 dye conjugated to recombinantly engineered REAfinity Antibodies for higher reproducibility. 0.6 10¹ 1 0 -1 -1 0 1 10¹ 10² CD4-PE-Vio 615 10³ 10¹ 1 0 -1 -1 0 1 10¹ 10² 10³ CD4-PE-Vio 615 Figure 19: Human PBMCs were stained using CD4 antibodies (clone VIT4) conjugated to PE-Vio615 followed by analysis using MACSQuant VYB (A) and MACSQuant Analyzer (B). Vio® Dyes technical specifications | April 20179/18 10³ CD335-VioBright FITC 10³ CD335-VioBright FITC Enhanced brightness PE-Vio® 615 is designed to offer a bright alternative to comparable dyes such as PE-efluor 610, PE-CF594, ECD, and PE/Dazzle 594 (figure 20). PE-Vio 615 not only allows for high fluorescent intensities but also excellent separation of positive population for higher stain indices (figure 21). This property of PE-Vio 615 makes it an excellent dye for analysis of dim and difficult to characterize markers (figure 22). 10² 10¹ 1 0 -1 -1 0 1 10¹ 10² 10³ 10² 10¹ 1 0 -1 -1 0 1 CD56-PE-Vio 615 — PE-eFluor610 — PE-CF594 — PE-Vio 615 — ECD — PE-Dazzle 594 Figure 20: Human PBMCs were stained using CD4 antibodies conjugated to PE-eFluor610, PE-CF594, PE-Vio615, ECD, PE-Dazzle594 and analyzed by flow cytometry using the MACSQuant VYB. Conjugate Clone MFI Stain index MACS Quant VYB Compensation in channel Y1 [%] CD4-PEVio 615 Vit-4.3 236 309 3.0 CD4-ECD SFCI12T4D11 133 185 3.3 CD4-PECF594 RPA-T4 201 295 2.6 CD4-PEeFluor610 RPA-T4 202 259 5.5 CD4-PE/ Dazzle594 RPA-T4 316 287 3.9 10² 10³ Figure 21: Human PBMCs were stained using CD56 antibodies (clone REA196) conjugated to either PE-Vio 615 or PE and CD335-VioBright FITC. Stained cells were then analyzed by flow cytometry using the MACSQuant VYB. Q1 25.2 Q2 1.03 Q1 25.1 Q2 1.09 Q4 73.6 Q3 0.13 Q4 73.5 Q3 0.31 Anti-IL-4-PE CD4-PE-Vio 615 10¹ CD56-PE Anti-IL-4-PE-Vio615 Figure 22: PBMCs were stimulated for 6 hours. After 2 hours, 1 µg/mL BrefeldinA was added for the last 4 hours. Cells were surface stained with CD4-FITC, fixed and permeabilized with the Inside Stain Kit (Miltenyi Biotec) and stained intracellularly with CD154-VioBlue and Anti-IL-4-PE or Anti-IL-4-PE-Vio615 (clone: 7A3-3). Cells were acquired on a BD Fortessa. Cells are gated on CD4 + lymphocytes, numbers indicate frequency among CD4 + cells. Data courtesy: Petra Bacher, Clinic for Rheumatology and Clinical Immunology, Charité – University Medicine Berlin, Berlin, Germany Table 12: MFI and stain indices of CD4 antibodies conjugated to PE-Vio 615, ECD, PE-CF594, PE-eFluor610, PE/Dazzle594. Vio® Dyes technical specifications | April 201710/18 Fixation stability Tandem conjugates are often sensitive to fixatives. Thus, for a successful flow cytomeric analysis, stability of tandem conjugates is critical. PE-Vio® 615 conjugate shows excellent stability to paraformaldehyde-based fixative without any increase in background signal (figure 23). Without fixation With fixation 10³ 10¹ 1 0 -1 -1 0 1 10¹ 10² 10³ 10² 10¹ 1 0 -1 -1 0 1 CD56-PE 10¹ 10² 10³ 10¹ 1 0 -1 -1 0 1 10¹ 10² 10³ 10¹ 10² 10³ CD56-PE-Vio 615 10² 10¹ 10² 10³ 10¹ 1 0 -1 -1 0 1 10¹ 10² 10³ 10² 10¹ t 24 h 1 0 -1 -1 0 1 CD56-PE-Vio 615 10¹ 10² 10³ CD56-PE-Dazzle594 10¹ 1 0 -1 -1 0 1 10¹ 10² 10³ 10² 10¹ 1 0 -1 -1 0 1 CD56-PE-Dazzle594 10¹ 10² 10³ CD56-PE-Vio 615 CD56-PE-Dazzle594 Compensation (%) 10² Decrease in MFI (%) 10³ CD335-VioBright FITC 10³ t 0 1 0 -1 -1 0 1 10³ CD335-VioBright FITC 10² 10¹ 10¹ CD56-PE-Dazzle594 10³ 1 0 -1 -1 0 1 10² CD56-PE-Vio 615 CD335-VioBright FITC CD335-VioBright FITC 10² CD56-PE 10³ CD335-VioBright FITC 10³ CD335-VioBright FITC 10² 10³ CD335-VioBright FITC CD335-VioBright FITC 10³ CD335-VioBright FITC Photo stability The stability of PE-Vio 615 upon exposure to ambient light (~850 Lux) was analyzed at different time points. Significantly higher mean fluorescence intensities (MFI) and stain indices (SI) for these time points, compared to commercially available alternatives, were also demonstrated (figure 23). CD56-PE-Vio 615 CD56-PE-Dazzle594 CD56-PE-Dazzle594 Light exposing time (h) without fixation with fixation Conjugate Clone MFI Stain index MFI Stain index CD56-PE REA196 12.0 33.2 11.9 32.7 CD56-PEVio 615 REA196 39.9 70.9 40.1 71.4 CD56-PEDazzle594 HCD56 30.5 42.2 31.5 54.0 Light exposing time (h) Figure 24: Human PBMCs were stained, using CD56 antibodies conjugated to PE-Vio615 (clone REA196) or PE-Dazzle594 (clone HCD56). Stained cells were then exposed to ambient light (~850 Lux) followed by analysis at different time points by flow cytometry using the MACSQuant VYB. Spill over in the Y1 channel, which is optimized for detection of PE signal was also analyzed after exposure to light. Figure 23: Human PBMCs were stained using CD56 antibodies (clone REA196) conjugated to PE, PE-Vio615 or PE-Dazzle594. In addition, cells were stained with CD335-VioBright FITC and analyzed before and after fixation using paraformaldehyde. Stained cells were analyzed by flow cytometry using the MACSQuant VYB. Vio® Dyes technical specifications | April 201711/18 Fluorochrome Absorption max. (nm) Emission max. (nm) PerCP 482 675 PerCP-Vio 700 482 704 PerCP-Cy5.5 490 695 A 1000 B 1000 750 750 Table 13: Absorption and emission maximums of fluorochromes related to PerCP-Vio700. Side scatter •Combines the peridinin chlorophyll protein (PerCP) and the new Vio® 700 dye •Emits strong fluorescence at 655–730 upon blue laser excitation at 488 nm • Suitable for the B3 channel of the MACSQuant Analyzer Enhanced brightness Human peripheral blood mononuclear cells (PBMC) and mouse spenocyte (MS) cells were stained with PerCP-Vio 700, and consequently exhibited excellent separation between positive and negative populations over many different antibody specificities (figure 26). Side scatter PerCP-Vio® 700 Tandem Conjugate 500 250 0 -1 0 1 10¹ 10² 500 250 0 -1 0 1 10³ CD20-PerCP-Vio 700 D 1000 750 750 Side scatter C 1000 Side scatter Laser and filter compatibility Using a standard 655–730 bandpass filter, PerCP-Vio 700 exhibits a very narrow fluorescence spectral profile, thus allowing the majority of light to be captured and retained (figure 25). 500 250 0 -1 0 1 100 10¹ 10² 10² 10³ 500 250 0 -1 0 1 10³ CD45-PerCP-Vio 700 80 10¹ CD4-PerCP-Vio 700 10¹ 10² 10³ CD90.2-PerCP-Vio 700 Intensity 70 Figure 26: Human peripheral blood mononuclear cells (PBMC) or mouse spenocyte (MS) cells were stained with CD20-PerCP-Vio 700 (A; PBMCs), CD4-PerCP-Vio700 (B; PBMCs), CD45-PerCP-Vio 700 (C; PBMCs) or CD90.2-PerCP-Vio 700 (D; MS) and analyzed by flow cytometry using the MACSQuant Analyzer. 60 50 40 30 20 10 0 350 500 650 800 High stability during fixation PerCP-Vio 700 shows excellent fixation stabilities, with only minimal decreases in fluorescence after fixation (figure 27). Wavelength (nm) B 1000 750 750 Figure 25: Absorption and emission spectra of PerCP-Vio 700. The blue box represents the 655–730 filter. Side scatter A 1000 Emisson Side scatter Absorption 500 250 0 -1 0 1 10¹ 10² CD8-PerCP-Vio 700 10³ 500 250 0 -1 0 1 10¹ 10² 10³ CD8-PerCP-Vio 700 Figure 27: CD8-PerCP-Vio 700 before (A) and after (B) fixation with 3.7% paraformaldehyde, indicating a minimal decrease in fluorescence after fixation. Vio® Dyes technical specifications | April 201712/18 Photo-induced conjugate degradation Analysis of the photo-induced degradation of CD14-PerCPVio 700 indicated no discernable changes after up to four hours of continuous exposure to ambient light (~850 Lux). Significantly higher mean fluorescence intensities (MFI) and stain indices (SI) for these time points, compare to commercially available alternatives (BD Biosciences), were also demonstrated (figure 28). t 0 min CD14-PerCP-Cy5.5 CD14-PerCP CD14-PerCP-Vio 700 t 120 min t 240 min CD11b-FITC Marker Clone CD14-PerCP TÜK4 53 44 36 CD14-PerCP-Vio 700 TÜK4 75 75 75 CD14-PerCP-Cy5.5 61D3 36 31 28 t 0 min Stain index t 120 min t 240 min Figure 28: Photo-induced conjugate degradation of PerCP, PerCP‑Vio 700, and PerCP-Cy5.5 with corresponding MFI and SI. Conjugates were exposed to ambient light for up to 4 hours, with negligible degradation rates. Vio® Dyes technical specifications | April 201713/18 Absorption max. (nm) 750 750 PE-Vio 770 496, 565 775 496, 565 785 PE-Alexa Fluor 750 496, 546 775 Table 14: Absorption and emission maximums of fluorochromes comparable to PE-Vio770. 250 10² 500 250 0 -1 0 1 10³ CD3-PE-Vio 770 D 1000 750 750 500 250 0 -1 0 1 10¹ 10² 10¹ 10² 10³ CD14-PE-Vio 770 C 1000 10³ CD19-PE-Vio 770 500 250 0 -1 0 1 10¹ 10² 10³ CD4-Biotin/ Anti-Biotin-PE-Vio 770 Figure 30: Human peripheral blood mononuclear cells (PBMC) or mouse splenocyte (MS) cells were stained with CD3-PE-Vio 770 (A; PBMCs), CD14-PE-Vio 770 (B; PBMCs), CD19-PE-Vio770 (C; PBMCs), or CD4-Biotin/Anti-Biotin-PE-Vio 770 (D; MS) and analyzed by flow cytometry using the MACSQuant Analyzer. 100 80 70 Intensity 10¹ PE-Vio770 PE-Vio770 PE-Cy7 PE-Cy7 Relative cell number Relative cell number Laser and filter compatibility The tandem dyes PE-Vio 770, PE-Cy7, and PE-Alexa Fluor 750 all use PE as the donor molecule, showing absorption at 496 nm and to a greater extent at 565 nm. Consequently, flow cytometers, such as the MACSQuant VYB, equipped with a yellow 561 nm laser, provide maximum excitation to PE molecules, which in turn transfer this energy to the respective acceptor molecule. Few differences in the emission properties can be found between Vio 770, Cy7, and Alexa Fluor 750, making each tandem best suited to flow cytometry platforms using 750 LP filters (figure 21). 500 0 -1 0 1 Emission max. (nm) PE-Cy7 Side scatter B 1000 Side scatter Fluorochrome A 1000 Side scatter The PE-Vio® 770 Dye is a tandem conjugate, like PE-Cy™7, that exploits the principle of fluorescence-resonanceenergy-transfer (FRET) allowing for large Stokes shifts between the absorbed energy of a fluorescence donor (PE) and the emission wavelength of a suitable acceptor (Vio 770) dye. •Excitation with the blue (488 nm) or yellow (561 nm) laser, emission in the near-infrared region at 775 nm •The combination of Vio 770 as the acceptor dye and an optimized chemistry have furnished a tandem dye that is characterized by a high fluorescence intensity, minimal spillover to adjacent detection channels, and low non-specific binding to non-target cells to meet the complexity of multiparameter cell analysis •Higher MFI and stain index values, in addition to lower compensation settings when compared to PE-Cy7 Enhanced brightness PE-Vio 770 provides the greatest fluorescence intensity of the Vio Dye family, with excellent separation of positively and negatively stained cells (figure 30). When compared to other spectrally similar tandem conjugates, such as PE-Cy7 (figure 31) or PE-Alexa Fluor 750, PE-Vio 770 exhibits significantly higher mean fluorescence intensities (MFI) and stain indices, and requires less compensation (table 14). These properties make PE-Vio 770 a far superior tandem conjugate compared to PE-Cy7 or PE-Alexa Fluor 750. Side scatter PE-Vio® 770 Tandem Conjugate 60 -1 -1 0 10 1 10¹ 10¹ 10² 10² 10³ 10³ 50 40 PE-Vio 770 30 20 10 0 400 450 500 550 600 650 700 750 800 850 PE-Cy7 Figure 31: Analysis of human PBMCs using CD8 antibodies (clone: BW135/80) conjugated to either PE-Vio 770 or PE-Cy7. Concurrent staining with CD14-PerCP and CD56-PE was performed to exclude CD14 + and CD56+ cells from the analysis. Wavelength (nm) Absorption Emisson Figure 29: Absorption and emission spectra of PE-Vio 770. Vio® Dyes technical specifications | April 201714/18 Sample Conjugate MFI Stain index Compensation in channel B2 (%) A CD8-PEVio 770 109.2 97.3 0.4 A CD8-PE-Cy7 67.0 72.7 2.2 B CD8-PEVio 770 101.0 112.0 0.4 B CD8-PE-Cy7 65.6 81.7 2.2 Photo-induced conjugate degradation Analysis of the photo-induced degradation of CD4-PEVio 770 indicated no discernable changes after up to four hours of continuous exposure to ambient light (~850 Lux). Significantly higher mean fluorescence intensities (MFI) and stain indices (SI) for these time points, compare to commercially available alternatives (BD™ Biosciences), were also demonstrated (figure 33). Table 15: MFI and stain indices of CD8-PE-Vio 770 and CD8-PE-Cy7. Fixation stabilities Tandem conjugates are usually less stable after fixation than single absorption/emission fluorochromes. However, PE-Vio 770 shows excellent stability as shown in figure 32. Cells fixed and stained with PE-Vio 770, in general, exhibit between a 0% and 7% loss in fluorescence, making them excellent candidates for fixation studies. B 10² 10¹ 1 0 -1 10³ CD45RO-FITC CD45RO-FITC 10³ -1 0 1 10¹ 10² CD45RA-PE-Vio 770 10³ t 120 min 10² 10¹ 1 0 -1 -1 0 1 10¹ 10² CD45RA-PE-Vio 770 Figure 32: CD45RA-PE-Vio 770 fluorescence before (A) and after (B) paraformaldehyde fixation. 10³ CD3-VioGreen A t 0 min t 240 min CD4 CD4-PE-Vio 770 Marker MFI Stain index Percent spillover (t0min vs. t 240min ) t 0min t 120min t 240min t 0min t 120min t 240min V1 B2 R1 CD4-PEVio 770 47 46 44 43 42 39 – 0.7/5.5 – CD4-PECy7 21 21 20 24 24 23 – 0.7/9.0 – Figure 33: Photo-induced conjugate degradation of PE-Vio 770, with corresponding MFI and SI. Red lines indicate CD4-PE-Vio 770 (clone VIT-4.3) from Miltenyi Biotec. Black lines indicate CD4-PE-Cy7 (clone SK3) from BD Biosciences. Conjugates were exposed to ambient light for up to four hours, with negligible degradation rates. Vio® Dyes technical specifications | April 201715/18 Absorption max. (nm) Emission max. (nm) APC-Vio 770 652 775 APC-Cy7 650 774 APC-Alexa Fluor 750 650 775 Table 16: Absorption and emission maximums of fluorochromes related to APC-Vio 770. Laser and filter compatibility The tandem dyes APC-Vio 770, APC-Cy7, and APC-H7 all use APC as the donor fluorochrome, showing maximum absorption at 652 nm. The emission spectra for Vio 770, Cy7, H7, and Alexa Fluor 750 are similar, making APC-Vio 770 an ideal tandem conjugate candidate for this channel in all flow cytometers (figure 34). 100 B 1000 750 750 Side scatter Fluorochrome A 1000 500 250 0 -1 0 1 10¹ 10² 500 250 0 -1 0 1 10³ CD8-APC-Vio 770 C 1000 D 1000 750 750 500 250 0 -1 0 1 10¹ 10² 10¹ 10² 10³ CD45-APC-Vio 770 Side scatter •Large Stokes shift dye, excited with the yellow (561 nm) or red (635 nm) laser, with an emission in the near-infrared region at 775 nm •The combination of Vio® 770 as the acceptor dye and an optimized chemistry have furnished a tandem dye that is characterized by a high fluorescence intensity •Minimal spillover to adjacent detection channels and low non-specific binding to non-target cells to meet the complexity of multiparameter cell analysis •Higher MFI and stain index values, in addition to lower compensation settings, when compared to APC-Cy7 Side scatter APC-Vio® 770 Tandem Conjugate Enhanced brightness APC-Vio 770 provides strong fluorescent staining, allowing the identification and analysis of specific cellular populations (figure 35). When compared to other spectrally similar conjugates such as APC-Cy7 and APC-H7, APC-Vio 770 exhibits equal or stronger staining patterns (figure 36). In addition, APC-Vio 770 generally exhibits higher mean fluorescence intensities (MFI) and greater stain index values, and requires less compensation in the R1 channel than both APC-Cy7 and APC-H7 (table 15). These properties make APC-Vio 770 an ideal fluorochrome for use in the R2 channel. Side scatter Red laser dyes 10³ 500 250 0 -1 0 1 CD19-APC-Vio 770 10¹ 10² 10³ CD4-APC-Vio 770 Figure 35: Human peripheral blood mononuclear cells (PBMC) or mouse splenocyte (MS) cells were stained with CD8-APC-Vio 770 (A; PBMCs), CD45-APC-Vio 770 (B; PBMCs), CD19-APC-Vio 770 (C; MS), or CD4-APC-Vio 770 (D; MS) and analyzed by flow cytometry using the MACSQuant Analyzer. 80 60 APC-Vio770 APC-Vio770 APC-Cy7 APC-Cy7 APC-H7 APC-H7 Relative cell number Relative cell number Intensity 70 50 40 30 20 10 0 -1 -1 0 10 1 10¹ 10¹ 10² 10² 10³ 10³ 500 550 600 650 700 750 800 850 Wavelength (nm) APC-Vio 770 Absorption Emisson Figure 34: Absorption and emission spectra of APC-Vio 770. APC-Cy7 APC-H7 Figure 36: Analysis of human PBMCs using CD8 antibodies (clone BW135/80) conjugated to APC-Vio770, APC-Cy7, or APC-H7. Concurrent staining with CD14-PerCP and CD56-PE was performed to exclude CD14 + and CD56+ cells from the analysis. Vio® Dyes technical specifications | April 201716/18 Sample Conjugate MFI Stain index Compensation in channel R1 (%) A CD8-APCVio 770 41.4 52.8 7.0 A CD8-APC-Cy7 40.6 50.6 11.0 A CD8-APC-H7 32.2 45.8 9.0 B CD8-APCVio 770 39.4 57.8 7.0 B CD8-APC-Cy7 38.8 58.5 11.0 B CD8-APC-H7 31.2 51.8 9.0 Photo-induced conjugate degradation Analysis of the photo-induced degradation of CD8-APC-Vio 770 indicated no discernable changes after up to 4 hours of continuous exposure to ambient light (~850 Lux). Significantly higher mean fluorescence intensities (MFI) and stain indices (SI) for these time points, compared to commercially available alternatives (BD Biosciences), were also demonstrated (figure 38). Table 17: MFI and stain indices of CD8-APC-Vio 770, CD8-APC-Cy7, and CD8-APC-H7. t 0 min Fixation stabilities APC-Vio® 770 shows excellent stability after fixation with paraformaldehyde (figure 37), similar to PE-Vio 770. Cellular material fixed with APC-Vio 770 exhibited, on average, a fluorescence decrease of between 5% and 10%, indicating APC-Vio 770’s suitability and stability in fixation experiments. t 120 min 750 750 500 250 0 -1 0 1 10¹ 10² CD45-APC-Vio 770 10³ 500 250 0 -1 0 1 10¹ 10² 10³ CD45-APC-Vio 770 Figure 37: Cells were stained with CD45-APC-Vio 770 and left untreated (A) or fixed with paraformaldehyde (B). CD3-VioGreen Side scatter B 1000 Side scatter A 1000 t 240 min CD8 CD8-APC-Vio 770 Marker MFI Stain index Percent spillover (t 0min vs. t 240 min ) t 0min t 120min t 240min t 0min t 120min t 240min V1 B2 R1 CD8APCVio 770 41 41 39 24 23 22 – – 9.0/ 15.0 CD8APC-Cy7 15 15 15 11 11 11 – – 9.0/ 16.0 Figure 38: Photo-induced conjugate degradation of APC-Vio 770, with corresponding MFI and SI. Red lines indicate CD8-APC-Vio 770 (clone BW 135/80) from Miltenyi Biotec. Black lines indicate CD8-APC-Cy7 (clone RPA-T8) from BD Biosciences. Conjugates were exposed to ambient light for up to four hours, with negligible degradation rates. For a complete antibody product list refer to www.miltenyibiotec.com/antibodies Vio® Dyes technical specifications | April 201717/18 Germany/Austria/ Switzerland Miltenyi Biotec GmbH Friedrich-Ebert-Straße 68 51429 Bergisch Gladbach Germany Phone +49 2204 8306-0 Fax +49 2204 85197 [email protected] USA/Canada Miltenyi Biotec Inc. 2303 Lindbergh Street Auburn, CA 95602, USA Phone 800 FOR MACS Phone +1 530 888 8871 Fax +1 877 591 1060 [email protected] Australia Miltenyi Biotec Australia Pty. Ltd. Unit 16 A , 2 Eden Park Drive Macquarie Park NSW 2113 Australia Phone +61 2 8877 7400 Fax +61 2 9889 5044 [email protected] Benelux Miltenyi Biotec B.V. 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Almac House, Church Lane Bisley, Surrey GU24 9DR, UK Phone +44 1483 799 800 Fax +44 1483 799 811 [email protected] www.miltenyibiotec.com Miltenyi Biotec provides products and services worldwide. Visit www.miltenyibiotec.com/local to find your nearest Miltenyi Biotec contact. Unless otherwise specifically indicated, Miltenyi Biotec products and services are for research use only and not for therapeutic or diagnostic use. Vio, VioBlue, VioGreen, VioBright, MACS, MACSQuant, and the MACS logo are registered trademarks or trademarks of Miltenyi Biotec GmbH and/or its affiliates in various countries worldwide. All other trademarks mentioned in this document are the property of their respective owners and are used for identification purposes only. Copyright © 2017 Miltenyi Biotec GmbH and/or its affiliates. All rights reserved. Vio® Dyes technical specifications | April 201718/18
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